With the economy deteriorating rapidly, the nation’s employers shed 533,000 jobs in November, the 11th consecutive monthly decline, the government reported Friday morning, and the unemployment rate rose to 6.7 percent.

The decline, the largest since December 1974, was fresh evidence that the economic contraction accelerated in November, promising to make the current recession, already 12 months old, the longest since the Great Depression. The previous record was 16 months, in the severe recessions of the mid-1970s and early 1980s.

“We have recorded the largest decline in consumer confidence in our history,” said Richard T. Curtin, director of the Reuters/University of Michigan Survey of Consumers, which started its polling in the 1950s. “It is being driven down by a host of factors: falling home and stock prices, fewer work hours, smaller bonuses, less overtime and disappearing jobs.”

The employment report increased the likelihood that Congress, with the support of President-elect Barack Obama, will enact a stimulus package by late January that could exceed $500 billion over two years. More than half that money would probably be channeled into public infrastructure spending. Many economists consider such investments an effective way to counteract, through federally financed employment, the layoffs and hiring freezes spreading through the private sector.

“Basically $100 billion of public investment in such things as roads, bridges and levees would generate two million jobs,” Robert N. Pollin, an economist at the University of Massachusetts, said. “That would offset the two million jobs that we are now on track to lose by early next year.”